// Copyright (C) 2017 Mozilla Corporation.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-atomics.compareexchange
description: Test Atomics.compareExchange on arrays that allow atomic operations.
includes: [testAtomics.js, testTypedArray.js]
features: [ArrayBuffer, Atomics, DataView, SharedArrayBuffer, Symbol, TypedArray]
---*/

function Test() {
    const sab = new SharedArrayBuffer(1024);
    const ab = new ArrayBuffer(16);
    const views = intArrayConstructors.slice();

    testWithTypedArrayConstructors(function(TA) {
      // Make it interesting - use non-zero byteOffsets and non-zero indexes.

      const view = new TA(sab, 32, 20);
      const control = new TA(ab, 0, 2);

      // Performs the exchange
      view[8] = 0;
      assert.sameValue(
        Atomics.compareExchange(view, 8, 0, 10),
        0,
        'Atomics.compareExchange(view, 8, 0, 10) returns 0'
      );
      assert.sameValue(view[8], 10, 'The value of view[8] is 10');

      view[8] = 0;
      assert.sameValue(Atomics.compareExchange(view, 8, 1, 10), 0,
        'Atomics.compareExchange(view, 8, 1, 10) returns 0');
      assert.sameValue(view[8], 0, 'The value of view[8] is 0');

      view[8] = 0;
      assert.sameValue(Atomics.compareExchange(view, 8, 0, -5), 0,
        'Atomics.compareExchange(view, 8, 0, -5) returns 0');
      control[0] = -5;
      assert.sameValue(view[8], control[0], 'The value of view[8] equals the value of `control[0]` (-5)');


      view[3] = -5;
      control[0] = -5;
      assert.sameValue(Atomics.compareExchange(view, 3, -5, 0), control[0],
        'Atomics.compareExchange(view, 3, -5, 0) returns the value of `control[0]` (-5)');
      assert.sameValue(view[3], 0, 'The value of view[3] is 0');


      control[0] = 12345;
      view[3] = 12345;
      assert.sameValue(Atomics.compareExchange(view, 3, 12345, 0), control[0],
        'Atomics.compareExchange(view, 3, 12345, 0) returns the value of `control[0]` (12345)');
      assert.sameValue(view[3], 0, 'The value of view[3] is 0');

      control[0] = 123456789;
      view[3] = 123456789;
      assert.sameValue(Atomics.compareExchange(view, 3, 123456789, 0), control[0],
        'Atomics.compareExchange(view, 3, 123456789, 0) returns the value of `control[0]` (123456789)');
      assert.sameValue(view[3], 0, 'The value of view[3] is 0');

      // In-bounds boundary cases for indexing
      testWithAtomicsInBoundsIndices(function(IdxGen) {
        let Idx = IdxGen(view);
        view.fill(0);
        // Atomics.store() computes an index from Idx in the same way as other
        // Atomics operations, not quite like view[Idx].
        Atomics.store(view, Idx, 37);
        assert.sameValue(
          Atomics.compareExchange(view, Idx, 37, 0),
          37,
          'Atomics.compareExchange(view, Idx, 37, 0) returns 37'
        );
      });
    }, views);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
